This is not really addressed to the OP, but I'm answering her questions for everyone to see and for their benefit.
This is absolutely 110% correct. No one can be saved without having the Holy Spirit in them. Jesus lives and works inside our heart as the Holy Spirit, spending quality time everyday transforming us into His image (sanctification).
What makes Jesus' way the only way to God and salvation is the Holy Spirit. No other religion offers the Holy Spirit, meaning you're basically trying to save yourself on your own. With Christianity, you have Jesus leading you from within.....everyday.
Other than the initiation, the day when the Holy Spirit came upon each of us who has it. You also know by a gradual change in your heart, the new characteristics Paul described in Galatians 5:22-23 gradually develops and becomes apparent. When you have the Holy Spirit, others will be able to see the fruits you produce regularly, even daily for some. Matthew 7:16-17, Matthew 5:16.
Galatians 5:22-23 New King James Version (NKJV)
22 But the fruit of the Spirit is love, joy, peace, longsuffering, kindness, goodness, faithfulness, 23 gentleness, self-control. Against such there is no law.
The people, even Christians, that do not have the Holy Spirit, these are their characteristics, the fruits of the flesh.
Galatians 5:19-21 New King James Version (NKJV)
19 Now the works of the flesh are evident, which are: adultery, fornication, uncleanness, lewdness, 20 idolatry, sorcery, hatred, contentions, jealousies, outbursts of wrath, selfish ambitions, dissensions, heresies, 21 envy, murders, drunkenness, revelries, and the like; of which I tell you beforehand, just as I also told you in time past, that those who practice such things will not inherit the kingdom of God.
Now it's very possible for Christians that just received the Holy Spirit demonstrate more characteristics of the flesh than the Spirit because sanctification is a process over time which Jesus works inside of us to change our behavior.
But a person filled with the Holy Spirit WILL absolutely change inside overtime. To think otherwise and think one's save while not demonstrating the fruits of the Spirit regularly nor rid themselves of the flesh are really saying Jesus is a failure. Some people really need to think about this that swear salvation is by faith alone.
You will absolutely know them by their fruits. The Holy Spirit is what empowers us to show it's fruits for all to see (especially by God) through our good deeds towards others.
Matthew 7:16-20 New King James Version (NKJV)
16 You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? 17 Even so, every good tree bears good fruit, but a bad tree bears bad fruit.18 A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 Therefore by their fruits you will know them.
John 3:16-21 New King James Version (NKJV)
16 For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life. 17 For God did not send His Son into the world to condemn the world, but that the world through Him might be saved.
18 “He who believes in Him is not condemned; but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that the light has come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For everyone practicing evil hates the light and does not come to the light, lest his deeds should be exposed. 21 But he who does the truth comes to the light, that his deeds may be clearly seen, that they have been done in God.”
For anyone uncertain if they have the Holy Spirit, pray daily asking God to send you His Holy Spirit. You can expedite this by going out trying to do good deeds towards others as Jesus tells us in the parable of the young rich man, Matthew 19:16-30, Mark 10:17-31, Luke 18:18-30, and in the parable of the Good Samaritan, Luke 10:25-37.
When God sees you trying to do good, He will then send you His Holy Spirit to help you do greater works that you were not able to do on your own. The HS will empower you to do His will, His good deeds towards others.
John 14:12 New King James Version (NKJV)
“Most assuredly, I say to you, he who believes in Me, the works that I do he will do also; and greater works than these he will do, because I go to My Father.
One other very important note, thinking good and doing good are two different things. God will not send anyone the HS for merely thinking good deeds, you have to do it and do it first, Romans 2:13, James 1:22-23.
And no one goes to heaven without the HS in them. No one can be allowed into heaven still covered in sin.