By my understanding, God has not withdrawn his presence from Modern Man - but Modern Man's minds is now closed from spontaneous and unconscious knowledge of God - in a way that was not the case in ancient times - nor in our own early childhood.
In other words - as a typical Modern Man reaches adolescence. he enters a state where his consciousness is cut-off from that spontaneous and unconscious knowledge of God (the state of Original Participation, as Owen Barfield termed it); which is what gave ancient people (and still gives children) underlying confidence in the reality and goodness of creation, and hope for their own future beyond death.
This confidence and hope transcended the official contents of their religions - even when (for example) those religions branded mortal life as suffering merely, and denied life beyond mortal life.
Yet Modern Man is bereft of those natural supports of the past; and therefore is prone to regard life as futile and despair as realistic.
The only alternative to such nihilism is that Modern Man makes a conscious choice from his situation of cut-off-ness: the choice to regard Jesus Christ as truly divine, his promise of resurrected Heavenly life eternal as desired, and to 'believe-on' and 'follow' Jesus to this goal.
Modern Man is on-his-own as never before, because of the nature of his walled-off consciousness; but God is still there - just a choice away; within the soul and all around; ready to commence contact instantly, as soon as our free consciousness wipes the window, opens the door.
But even a wholly-Good God, and the knowledge that we are members of God's family, does not suffice to justify this mortal life unless it is also understood as a preparation for Heaven.
Because in this mortal world; entropy rules, all that is Good changes and corrupts with time, and death is the inevitable terminus.
If the mortal life were everything - in a context of eternity even the 'best' mortal life would be a futile waste of time...
Confidence in a benign creator God is vitally necessary but not enough for Modern Man, in his alienation and isolation. Therefore, unless we are to be drawn to the embrace death, nothingness and hope-less-ness - we must also choose Jesus.