'Strength' in the Bible

“You are the salt of the earth; but if the salt has lost its taste (purpose), how can it be made salty? It is no longer good for anything, but to be thrown out and walked on by people [when the walkways are wet and slippery].

But when he saw the strength of the wind, he was afraid. And beginning to sink he cried out, “Lord, save me!”

And Jesus got his disciples together and said, I have pity for the people, because they have now been with me three days and have no food: and I will not send them away without food, or they will have no strength for the journey.

For many will come in My name [misusing it, and appropriating the strength of the name which belongs to Me], saying, ‘I am the Christ (the Messiah, the Anointed),’ and they will mislead many.