"I will give you what my Father promised to give you." God had promised to give the Holy Spirit. The UDB makes this explicit. (See: [[rc://en/ta/man/jit/figs-explicit]])
God's power will cover them in the same way that clothes cover a person. This can be stated in active form. Alternate translation: "you receive power" (See: [[rc://en/ta/man/jit/figs-metaphor]] and [[rc://en/ta/man/jit/figs-activepassive]])