Psalms 51:11 "Cast me not away from thy presence; and take not thy holy Spirit from me."
How could I live (Spiritually) without the presence of the LORD? I could breathe (as I've done in the past while in sin), but I couldn't "live!"
Matthew 6:33 asks us to "Seek ye first the kingdom of God, and His righteousness; and ALL these THINGS shall be added unto you." And why not? Because He said in III John 2 "Beloved, I wish above ALL THINGS that thou mayest prosper and be in health, even as thy soul propsereth!"
Once we "seek" HIM with a "pure heart" (Matthew 5:8) and are "born again" (John 3:7), He told us in Deuteronomy 31:6 "...I will never leave you or forsake you..."
Consequently, we can do as Hebrews 4:9-11 says "There remaineth therefore a "rest" to the people of God. For he that is entered into His "rest," he also hath ceased from his "own works," as God did from His. Let us labour therefore to enter into that "rest," lest any man fall after the same example of unbelief."
Why then would we need ANYTHING else?