"Finally, beloved, whatever is true, whatever is honourable, whatever is just, whatever is pure, whatever is pleasing, whatever is commendable, if there is any excellence and if there is anything worthy of praise, think about these things."Paul is telling the Phillipian's this because he knows that what you think is what you become and wants these people to become pure, pleasing, commendable - excellent and worthy of praise.
I think the lesson for us is to be careful about what you expose yourself to day to day. Not to say we can't occasionally watch a scary movie, tune in to the cable news networks, or read the newspaper reports of murders, fires, earthquakes etc., but if we make that sort of thing a steady diet then we tend toward fearfulness, anxiety, hate, mistrust, anger, depression and other mindsets that we don't want to foster.
It's not about being a Pollyanna - but rather giving yourself a space to think about good things, and reflect on how blessed we are to be alive on this earth right now.
Wishing you peace, moments of joy and some time to recognize that which is pure, pleasing, commendable, excellent and worthy of praise.