He will bring forth justice and mercy for their lives amid the tribulations and adversities associated with Christ's return, represented here as adversaries troubling Christ’s disciples or God's chosen ones. The "elect" refers to those loyal to God, especially the true disciples of Jesus Christ, termed "elect" as they are selected by God from a world of disbelief for eternal joy and life, being genuine children of God. This imagery draws from God's selection of the Jewish nation from among all peoples to be His special possession. The phrase "crying to Him day and night" signifies the fervent and persistent prayer of believers, illustrating their steadfastness.
Though He may seem delayed in offering them help, God tests their faith, not immediately responding to their petitions; He may allow trials and hardships, appearing as though He has abandoned them, yet He never actually forsakes them, providing assistance swiftly compared to the prolonged refusal of the stated judge to help the widow. It is essential, in this case, to maintain unwavering dedication in prayer. The question posed, "But the Son of Man...," raises the concern: despite the undeniable truth that God will swiftly safeguard His elect, will He encounter such faithful individuals who exhibit the necessary steadfastness and diligence in prayer? There is no doubt of God's fidelity to His promises of protection for His chosen ones; the real worry lies in whether His elect will persist in prayer, enduring the trials and tribulations they face. This saying conveys that it is more concerning whether Christians will falter in their faith than it is to question God's commitment to assist the faithful; in short, it is more likely that the faithful could wane in their belief than that God would prove unfaithful. This underscores the unchanging nature and reliability of God's promises regarding the protection of His faithful ones, rather than suggesting an overall loss of faith before the Savior's arrival.
The phrase "having come" refers to the Messiah's arrival in judgment upon the Jewish people amidst the destruction of Jerusalem, while also anticipating the second coming of Christ at the end of time, as the first advent foreshadows the second. The term "faith" is frequently used in Scripture to encompass religion in its entirety, but in this context, it takes on a more specific meaning. As the Lord teaches His disciples that amidst profound trials, God will safeguard His elect through their persistent prayer according to His promises, He asks whether among them will be sufficient constancy and endurance in prayer. Will there be within them such strength and vitality of faith to uphold this steadfastness? Will He discover His followers to be vigilant in prayer and firm in faith, aligning with His determination to aid and protect them through their trials, tribulations, and temptations?