"And now, Israel, what doth the LORD thy God require of thee, but to fear the Lord thy God, to walk in all his ways, and to love him, and to serve the LORD thy God with all thy heart and with all thy soul?" (Deuteronomy 10:12)

"In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him. Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins." (1 John 4:9-10)

"Jesus Christ: Whom having not seen, ye love; in whom, though now ye see him not, yet believing, ye rejoice with joy unspeakable and full of glory." (1 Peter 1:7-8)

"That I may know him, and the power of his resurrection, and the fellowship of his sufferings, being made conformable unto his death." (Philippians 3:10)

The third verse of "Deeper and Deeper" speaks of the suffering we will encounter if we are mature in Christ and effective in His service.

"I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.