It is important to remember who our source is. A branch off a vine is not the same as the vine itself. The vine provides nourishment to/ for the branches. The branches then go on to produce fruit. If a branch is cut off from the vine, it will not produce fruit. Not only will it not produce fruit, it will wither and die - being of no use.
If you want your life to be fruitful, make sure you are connected to the Vine.