Can a Christian defend himself and others?

Everything Has Its Time​

Ecclesiastes 3:1-8 (New King James Version)

1 To everything there is a season,
A time for every purpose under heaven:

2 A time to be born,
And a time to die;
A time to plant,
And a time to pluck what is planted;

3 A time to kill,
And a time to heal;
A time to break down,
And a time to build up;

4 A time to weep,
And a time to laugh;
A time to mourn,
And a time to dance;

5 A time to cast away stones,
And a time to gather stones;
A time to embrace,
And a time to refrain from embracing;

6 A time to gain,
And a time to lose;
A time to keep,
And a time to throw away;

7 A time to tear,
And a time to sew;
A time to keep silence,
And a time to speak;

8 A time to love,
And a time to hate;
A time of war,
And a time of peace.