Persistence matters .

A man began to sink a well, but having dug down to a depth of twenty cubits, he could not find any trace of water there. So he gave up that site and selected another spot for the purpose. There he dug still deeper, but even then could not find any water. So he selected yet another site and dug deeper
than before, but it was also of no avail.
At last in utter disgust he gave up the task altogether.
The total depth of all these three wells was only a little short of one hundred cubits. Had he the patience to devote even half of the whole of this labour to his first well instead of changing the site again and again, he would surely have succeeded in getting water.
The same is the case with men who continually change their faith.

IN ORDER TO SUCCEED WE HAVE TO DEVOTE OURSELVES WHOLEHEARTEDLY TO ONE OBJECT OF FAITH WITHOUT BEING IN THE LEAST DOUBTFUL AS TO ITS WORTH.

– Sayings of Sri Ramakrishna. (528).