Translation of "quiddam" into English

Hoc impedit quominus consideremus naturam veluti seiunctum a nobis quiddam aut veluti merum nostrae vitae marginem.

Nature cannot be regarded as something separate from ourselves or as a mere setting in which we live.

Non veluti spongia est quaedam quae omnia delet ita ut quod factum sit in terra eandem tandem habeat vim.

It is not a sponge which wipes everything away, so that whatever someone has done on earth ends up being of equal value.