Matthew 7:1-3 -
“Judge not, that you be not judged. 2 For with what judgment you judge, you will be judged; and with the measure you use, it will be measured back to you. 3 And why do you look at the speck in your brother’s eye, but do not consider the plank in your own eye?
That's a good quote. We are not to judge the state of anyone's soul.
But we are to judge their actions, and speak out to help them avoid evil.
See
Ezekial 3:18-21
18 If I say to the wicked, You shall surely die—and you do not warn them or speak out to dissuade the wicked from their evil conduct in order to save their lives—then they shall die for their sin,
but I will hold you responsible for their blood.
19
If, however, you warn the wicked and they still do not turn from their wickedness and evil conduct, they shall die for their sin, but
you shall save your life.
20 But if the just turn away from their right conduct and do evil when I place a stumbling block before them, then they shall die. Since you did not warn them about their sin, they shall still die, and the just deeds that they performed will not be remembered on their behalf. I will, however, hold you responsible for their blood.
21 If, on the other hand, you warn the just to avoid sin, and they do not sin, they will surely live because of the warning, and you in turn shall save your own life.
