take for granted

verb takes for granted · taking for granted · took for granted · taken for granted

1. transitive, of a thing To assume something to be true without verification or proof. Let it be considered a delicate intimation on the part of the historian that he is going back to the town in which Oliver Twist was born; the reader taking it for granted that there are good and substantial reasons for making the journey.
2. especially, idiomatic, transitive, of a person To give little attention to or to underestimate the value of; to fail to appreciate, especially something one has grown heavily accustomed to; not to value or care for appropriately, out of the assumption that the person or thing not valued cannot be lost. These great First Truths, these good and gracious Tidings, these holy and humanizing Spells, in the preconformity to which our very humanity may be said to consist, are so infused, that it were but a tame and inadequate expression to say, we all take them for granted.