Paul tells Timothy, an earnest Christian, to lay hold on eternal life (1Ti 6:12), and to encourage others to do the same. (vs 17-19) Why should we do this, lay hold on eternal life, if we know we already have eternal life? (1Jn 5:13) Why lay hold on what we can never lose? (2Ti 4:18)
For one, it’s exceedingly unwise to presume we have eternal salvation unless our lives are consistently reflecting this reality (He 6:9), proving it experientially (2Co 13:5), as we’re earnestly pursuing the living God (Php 3:12), to know Him more deeply, to obey Him more consistently, and to love Him more passionately. (2Pe 1:5-7) Those who are complacent in their walk with God, comfortable in this world and focused on it, are actually enemies of the cross, headed for destruction. (Php 3:18-19)
It’s good for us to intentionally and firmly grasp the salvation of God (Mt 11:12), to strive to enter the kingdom (Lk 13:24), to cleave to God and His redemption as our only hope, the precious anchor of our souls. (He 6:19) Our old man takes for granted the infinite mercy shown us in Christ, the incomprehensible price paid for our redemption (Ro 8:32), forgets we’ve been purged from our old sins, loses sight and perspective, and would pull us back into dullness and blindness. (2Pe 1:8-9)
Laying hold of eternal life is laying hold of Christ Himself: He is our life. (Col 3:4) It’s abiding in Him (Jn 15:4), partaking of Him (He 3:14), grounding ourselves in the promises and nature of God (Ep 3:17-19), continually reminding ourselves of His way and word. (Col 3:16) Those who won’t abide in Christ are trodden down (Ps 119:118) and cast away. (Jn 15:6)
Ultimately, laying hold of eternal life is letting go of everything else (Php 3:7-8) that we may know Him. (Jn 17:3)