A quick Google search finds this quote all over sedevacantist sites accusing the Pope of being an heretic. It supposedly was written in 1966. No context is given. Is this an actual quote of the then, Joseph Ratzinger, or is it a quote of someone else that he refutes? Without context, who knows?
However, I did find a more recent and reliable quote of Joseph Cardinal Razinger.
“God is near. God knows us. God is waiting for us in Jesus Christ in the Blessed Sacrament. Let us not leave him waiting in vain! Let us not, through distraction and lethargy, pass by the greatest and most important thing life offers us. We should let ourselves be reminded, by today’s reading, of the wonderful mystery kept close within the walls of our churches. Let us not pass it heedlessly by. Let us take time, in the course of the week, in passing, to go in and spend a moment with the Lord who is so near. During the day our churches should not be allowed to be dead houses, standing empty and seemingly useless. Jesus Christ’s invitation is always being proffered from them. This sacred proximity to us is always alive in them. It is always calling us and inviting us in. This is what is lovely about Catholic churches, that within them there is, as it were, always worship, because the eucharistic presence of the Lord dwells always within them. (Ratzinger, God is Near Us [San Francisco, CA: Ignatius Press, 2003], p. 103)