I am not sure about the correctness of these two sentences:It is a very good example why each person should be honest and this experience has changed my mind.
The university was significant part of my life because it has provided me with valuable experience and has changed my mind.
I concern about coherence of tenses: present simple + present perfect and also past simple + present perfect.
The university was significant part of my life because it has provided me with valuable experience and has changed my mind.
I concern about coherence of tenses: present simple + present perfect and also past simple + present perfect.