Play it by ear?

To play it by ear is to act according to the situation. Playing it by ear means you work with what you get.

The original meaning of this term was to play music without sheet music, meaning you improvised from what you heard and did your best to bring everything into harmony with a melody that everyone would appreciate.   Hmm?

Jesus said "I don't do anything except what I "see" (Present tense) my father doing.

I believe this is what it means when Paul said "All that are led by the spirit of God, they are the children of God"

Matthew 10:9 (Luke 12:12)When they bring you to trial, do not worry about what you are going to say or how you will say it; when the time comes, you will be given what you will say.