"A good tree doesn't produce bad fruit; on the other hand, a bad tree doesn't produce good fruit.
Luke 6:43-45 In-Context
“Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye?
How can you say to your brother, ‘Brother, let me take the speck out of your eye,’ when you yourself fail to see the plank in your own eye? You hypocrite, first take the plank out of your eye, and then you will see clearly to remove the speck from your brother’s eye.
“No good tree bears bad fruit, nor does a bad tree bear good fruit.
Each tree is recognized by its own fruit. People do not pick figs from thornbushes, or grapes from briers.
A good man brings good things out of the good stored up in his heart, and an evil man brings evil things out of the evil stored up in his heart. For the mouth speaks what the heart is full of.
“Why do you call me, ‘Lord, Lord,’ and do not do what I say?
As for everyone who comes to me and hears my words and puts them into practice, I will show you what they are like.