Mary and Joseph did not lose Jesus, it was He who left their side.
With us it is different; Jesus never abandons us. It is we men who can drive him away from us through sin, or at least drive him away through lukewarmness. In every encounter between man and Christ, the initiative has always been Jesus'; on the contrary, in every situation of disunity, the initiative is always ours. He never leaves us.
When man sins gravely, he loses himself and Christ. Man then walks without sense and without direction, for sin is essentially disorienting. Sin is the greatest tragedy that can happen to a Christian. In a few moments he is radically separated from God by the loss of sanctifying grace, he loses the merits acquired throughout his life, he is subject in some way to the slavery of the devil and the inclination to virtue diminishes in him. The estrangement from God "always brings with it a great destruction in the one who does it "5.
5 Unfortunately, the worst of all is that for many this is of little importance. It is lukewarmness, lack of love, that leads us to value little or nothing the company of Jesus, He does value being with us: He died on a cross to rescue us from the devil and from sin, and to be always with each one of us in this world and in the next.
Mary and Joseph loved Jesus dearly; that is why they searched for him without rest, that is why they suffered in a way that we cannot understand, that is why they rejoiced so much when they found him again. "Today there do not seem to be many people who suffer for his absence; there are Christians for whom the presence or absence of Christ in their souls means practically nothing. They pass from grace to sin and experience neither suffering nor pain, affliction nor anguish. They pass from sin to grace and do not give the impression of men who have returned from hell, who have passed from death to life: they do not have the relief, the joy, the peace and tranquility of those who have recovered Jesus "6.
How dark the world would be, and our world, without Jesus! What a great grace to realize this! "Jesus, may I never lose you again... "7. We will use every means, supernatural and human, to avoid falling into mortal sin and not even into deliberate venial sin. If we do not strive to abhor venial sin, without the false excuse that it is not "serious", we will not come to an intimate relationship with the Lord.
Hablar con Dios