To convince yourself is to talk yourself into believing something. Convince yourself it will be fine.
It is nearly always used sceptically, since the phrase implies the belief was chosen rather than reached. People convince yourself most easily of what they already wanted.
1phraseconvince yourselfTo talk yourself into believing something.
“You can convince yourself of almost anything at three in the morning.”
convince yourself is a phrase.
Practised in Thinking & Memory