'Convinced' in the Bible

and if you are convinced that you are a guide for the blind, a light to those in darkness,

because he was fully convinced that what He had promised He was also able to perform.

For I am convinced that neither death, nor life, nor angels, nor rulers, nor things present, nor things to come, nor powers,

One person considers one day to be above another day. Someone else considers every day to be the same. Each one must be fully convinced in his own mind.

I know and am convinced in the Lord Jesus that nothing is unclean in itself; but to him who thinks anything to be unclean, to him it is unclean.

My brothers, I myself am convinced about you that you also are full of goodness, filled with all knowledge, and able to instruct one another.