Psa 23:1-6 The "rod and staff" are discipline and instruction -- Heb 12:5-11, Isa 53:6, 1Pe 2:25. "You prepare a table for me in the presence of my enemies"We are also warrior Eph 6, 1Co 10, 2Ti 2. We are guests in the house of God; the enemy drives us to the Word to seek guidance (1Pe 5:6-11). Joh 6:35 - it is the Word that is the feast (Rev 3:19-20). Mat 5:6 - Jesus says well be satisfied if we hunger and thirst. Endurance is built by: temptation (Jam 1:12), trail (1Co10:13), discipline (Heb 12:5-7), reaping what we've sown ( Gal 6:7-9), overcoming (1Jo 5:4,5, Rev 12:11). "You annoint my head with oil". -- God in 1Sa 16:12-13 David was annointed for special purpose; Elisha was set apart in 1Ki 19:16. 1Co 12:13 we're annointed by the Holy Spirit (1Co 12:7 - spiritual gift and enablement - 1Jo 2:27). Priests are annointed; we are priests 1Pe 5:9, Rev 5:10; we are to offer prayers on behalf of other people. "My cup runs over" -- is a picture of rejoicing in our soul (Eph 1:5, Eph 1:9, Eph 1:11, Phi 4:4, 1Th 5:17-18). Phi 4:13-19 says He daily pours His strength into us. Others will be blessed by the overflow (Phi 1:12-18). "Surely goodness and mercy will follow me all the days of our lives"; our lives are measured in days (Lam 3:23, Heb 3:15). Goodness pours out in never-ending Grace (2Co 12:9, Rom 8:28, Gen 50:20, Joh 4:24); mercy holds back in patience; He protects and delivers; mercy cleanses us (1Jo 1:7-9, Psa 24:4, 2Pe 3:9). "I will dwell in the House of the Lord forever" is a declaration of certainty. Heb 3:1-5 - house of service that Jesus built. Heb 2:11 - the household and family of God. 1Jo 1:4 - house of fellowship and communion. 2Co 5:1-7 says that whether present or absent, or live or die we'll be with the Lord. Joh 14:1-3 Jesus pictures the "house" as many mansions -- a royal residence in the New Jerusalem custom made for us (Rev 21:1-7).
The Divine Mentor is God the Holy Spirit. God answered Jesus' prayer to provide us the Spirit not just to be with us but in us -- to pray with us labor with us to guide us teach us and equip us -- the goal being that we'd be prepared for the troubled times in which we live.