From Heidegger's Being and Time

'Ontically, "letting something be involved" signifies that within our factical concern we let something ready-to-hand be so-and-so as it is already and in order that it be such. The way we take this ontical sense of 'letting be' is, in principle, ontological. And therewith we Interpet the meaning of previously freeing what is proximally ready-to-hand within-the-world. Previously letting something 'be' does not mean that we must first bring it into its Being and produce it; it means rather that something which is already an 'entity' must be discovered in its readiness-to-hand, and that we must let the entity which has this being be encountered.' p.117