Present simple vs Past simple for opinions

Hello,

I am trying to explain how I chose a new career path during my studies for a writing task, and I have a problem with this part :

"I resolved to find a more meaningful career, and turning my hand to teaching came as an evidence to me. Helping children reach their full potential and find their way in life is definitely the best thing I can do for this world. Thus, I switched to an education degree."

I have used the present simple because I still think that it is the best thing I can do, but it sounds strange to me to have a sentence of present simple tense in the middle of a story written in the past tense.

Is my text correct or should I use the past simple for all sentences ?