Your purpose...should always be to know...the whole that was intended to be known. - Moshe ben Maimon

The so-called evils are evils only in relation to a certain thing, and that which is evil in relation to a certain existing thing, either includes the non-existence of that thing or the non-existence of some of its good conditions.

Even when a person suffers pain in consequence of a thorn having entered into his hand, although it is at once drawn out, it is a punishment that has been inflicted on him, and the least pleasure he enjoys is a reward; all this is meted out by strict justice; as is said in the Scripture, "all His ways are judgement" (Deut. xxxii. 4); we are only ignorant of the working of that judgement.

The more necessary a thing is for living beings, the more easily it is found and the cheaper it is; the less necessary it is, the rarer and dearer it is.