I wrote the following sentences last January immediately after doing a vipassana retreat in my house. To write this I had to get up every day at 4:30 and sit silently in a little room all day long for ten days in a row, so read it carefully.
The only person that has an influence on your mental state at all times is you.
The thing that has by far the biggest influence on your life is your mental state.
The causes for the experience you are having in the present are not quantifiable.
The causes that led to the present are everything.