What goes into a mind comes out in a life. (Greg Groeschel, motivational speaker)
What do they say in the computer world? GIGO: garbage in, garbage out. If bad data is entered, bad data will come out. In Mark 7:20 Jesus similarly remarks, “What comes out of a person is what defiles them.” If you’re concerned about how you come across to others, remember what your life reveals about you is the result of what you’ve taken into your mind.
Be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will. (Romans 12:2)