'Strengthened' in the Bible

For if someone weak sees you who possess knowledge dining in an idol's temple, will not his conscience be "strengthened" to eat food offered to idols?

I wish you all spoke in tongues, but even more that you would prophesy. The one who prophesies is greater than the one who speaks in tongues, unless he interprets so that the church may be strengthened.

For you are certainly giving thanks well, but the other person is not strengthened.