Roman philosopher Seneca wrote this:
"There are more things that frighten us than injure us, and we suffer more in imagination than in reality."
Not only anxious thoughts, but also resentment, grievances, pointless complaining, guilt and regret, criticism of self and others, perpetual discontent...... are ways in which we unconsciously create suffering for ourselves.
They arise in imagination (the mind). We need to recognize that these are all unnecessary baggage that brings a heaviness into our lives and strengthens a false sense of self.
When you recognize their pointlessness, you can let go of them and then MOVE THROUGH LIFE WITHOUT UNNECESSARY BAGGAGE, enjoying the present moment, including its challenges. And so the present moment becomes your friend, and you begin to experience life as supportive, rather than hostile.
"Easier said than done" is another famous quote, my friend.
A contrary opinion: The "heaviness" in our lives is there from causes that are worthy of exploration and a part of every human experience.
Do they "strengthen a false sense of self", or do they point out true places that need our attention, uncomfortable as they may be?
I don't think the answer is black and white. Sometimes we might be habitually suffering unnecessarily and moving on is the best choice. Other times it might be more wise to hang in there and go through the process of finding enlightenment in carrying the weight.
