The miracles performed by Jesus were done in public, witnessed by His twelve disciples, and by crowds of other people.
The miraculous events I’ve experienced were witnessed only by me, and the ones I know about from the lives of other Christians, I take on the basis of their account of what happened. A private miracle is different from a public miracle in that there is no real corroboration with a private miracle, and other people are free not to take it on board. The only type of corroboration possible is the spiritual fruit produced as a consequence of the event described.
Miracles performed by saints, like the miracles performed by the disciples, were witnessed by a wider public. In the case of St Francis of Assisi stories of miraculous happenings in his life were told and recorded by his followers. St Francis had the desire to imitate Christ.