"Solid food is for the mature, for those who have their powers of discernment trained by constant practice to distinguish good from evil." (Hebrews 5:14)
Discernment comes from obedience through constant practice to follow God, and discernment leads not to criticism but to intercession.
"Have mercy upon us, O Lord, have mercy upon us: for we are exceedingly piled with contempt." (Psalm 123:3)