I don't maintain my salvation.
The Bible says otherwise.
"...work out your own salvation with fear and trembling." (Philippians 2:12).
25 "And there went great multitudes with him: and he turned, and said unto them,
26 If any
man come to me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea, and his own life also, he cannot be my disciple.
27 And whosoever doth not bear his cross, and come after me, cannot be my disciple.
28 For which of you, intending to build a tower, sitteth not down first, and counteth the cost, whether he have
sufficient to finish
it?
29 Lest haply, after he hath laid the foundation, and is not able to finish
it, all that behold
it begin to mock him,
30 Saying, This man began to build, and was not able to finish." (Luke 14:25-30).
Jesus said,
"Then said Jesus to those Jews which believed on him, If ye continue in my word,
then are ye my disciples indeed;" (John 8:31).
"Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life." (John 5:24).
"He that is of God heareth God's words: ye therefore hear
them not,
because ye are not of God."
(John 8:47).
John 6:66-69 says,
"From that time many of his disciples went back, and walked no more with him. Then said Jesus unto the twelve, Will ye also go away? Then Simon Peter answered him, Lord, to whom shall we go? thou hast the words of eternal life. And we believe and are sure that thou art that Christ, the Son of the living God."
Jude 1:21 says,
"Keep yourselves in the love of God, looking for the mercy of our Lord Jesus Christ unto eternal life."
"Blessed
is the man that endureth temptation: for when he is tried, he shall receive the crown of life, which the Lord hath promised to them that love him." (James 1:12).
"He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death." (Revelation 2:11).
14 "I have written unto you, young men, because ye are strong, and the word of God abideth in you, and ye have overcome the wicked one.
15 Love not the world, neither the things
that are in the world. If any man love the world, the love of the Father is not in him.
16 For all that
is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world.
17 And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever." (1 John 2:14-17).
You said:
It's not a car or a pet. It's not like I'm constantly on the brink of losing it and I have to be frantically doing works to keep it going. The same God who saved me can certainly keep me until the end.
Yet, the Bible says,
"Examine yourselves, whether ye be in the faith; prove your own selves. Know ye not your own selves, how that Jesus Christ is in you, except ye be reprobates?" (2 Corinthians 13:5).
3 "And hereby we do know that we know him, if we keep his commandments.
4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
5 But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.
6 He that saith he abideth in him ought himself also so to walk, even as he walked."
(1 John 2:3-6).
12 "Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God.
13 But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin.
14 For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end;" (Hebrews 3:12-14).
You said:
I've attended churches exclusively until very recently that works were necessary to either be saved, stay saved, or both. There are just as many sinners in those churches as there are in any other. While in some an incorrect understanding of eternal security may lead to complacency, that in and of itself doesn't prove it false. People can abuse just about any doctrine you put forth.
First, gathering in big buildings (with unbelievers or fence sitters being invited to do altar calls) on a weekly basis is actually not a biblical form of fellowship.
Check out these threads here:
God's Order in the Church vs Man's Order
The Pastor King (New)
Second, we are living in the last days. The Bible talks about how in the last days men will have a form of godliness, but they will deny the power thereof. They will be lovers of their own selves, unholy, covetous, despisers of those who are good, etc.
1 This know also, that in the last days perilous times shall come.
2 For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,
3 Without natural affection, truce breakers, false accusers, incontinent, fierce, despisers of those that are good,
4 Traitors, heady, high minded, lovers of pleasures more than lovers of God;
5 Having a form of godliness, but denying the power thereof: from such turn away.
6 For of this sort are they which creep into houses, and lead captive silly women laden with sins, led away with divers lusts,
7 Ever learning, and never able to come to the knowledge of the truth.
8 Now as Jannes and Jambres withstood Moses, so do these also resist the truth: men of corrupt minds, reprobate concerning the faith.
9 But they shall proceed no further: for their folly shall be manifest unto all men, as theirs also was." (2 Timothy 3:1-9).
This is why you will not find many who are walking the straight and narrow path. Most are not interested in doing that. Noah and his family were the only ones who were righteous. The rest of the world was living wickedly and God destroyed that world with a flood.
The flood was an example to all who should live ungodly there after (See 2 Peter 2:5-6).
Most are not truly interested in following Jesus exactly. They want to do their own thing and also have the benefits of God. But it does not work like that. Jesus says you cannot serve two masters. Paul says,
"For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live." (Romans 8:13).