One thing, not often mentioned (probably because it's about believing in things), is that a spiritual dimension can come in real handy as a personal grounding.

Im not advocating for anything in particular, but things like meditation (which does not have to be based on religion), great books on living and life ect. can be very good to put things in perspective.

It's my observation that the word 'love' so much used in many hit songs, is often left very open, so it can mean divine love too. Playing with that spiritual dimension can be a great asset in developing universal lyrics IMO

I think having some sort of grounding could prove important, maybe not to break through, but to stay in contact with the muse and endure life (which also happens for artists cry )..