'Strength' in the Bible

And with great ability and power the apostles were continuously testifying to the resurrection of the Lord Jesus, and great grace [God’s remarkable lovingkindness and favor and goodwill] rested richly upon them all.

Now Stephen, full of grace (divine blessing, favor) and power, was doing great wonders and signs (attesting miracles) among the people.

But Saul increased in strength more and more, and continued to perplex the Jews who lived in Damascus by examining [theological evidence] and proving [with Scripture] that this Jesus is the Christ (the Messiah, the Anointed).

how God anointed Jesus of Nazareth with the Holy Spirit and with great power; and He went around doing good and healing all who were oppressed by the devil, because God was with Him.

After spending some time there, he left and traveled through the territory of Galatia and Phrygia, strengthening and encouraging all the disciples.

So I urge you to eat some food, for this is for your survival; for not a hair from the head of any of you will perish.”