"But what is past my help is past my care"

The quote "But what is previous my help is past my care" by Francis Beaumont appears to suggest that the speaker is not extremely concerned with things that they can not change or impact. More particularly, they are saying that if something is beyond their capability to help or influence, then they have no factor to stress or expend energy on it. Basically, the speaker is concentrating on the important things that they can manage, instead of wasting time and effort on things that are outside of their sphere of impact. This point of view can be seen as a kind of approval and can help people prioritize their efforts and conserve their resources.