Often the ones who get the applause deserve it the least and the sincere, honest person's contribution is very 'conveniently' overlooked by the majority. Should that stop us from doing our duty and living by our conscience? I don't think it should, because the truly great soul knows how to contribute to the general good even when not a single person claps for him. A great mind belongs to that man or woman who knows his calling and, regardless of the ridicule or the negligence from others, finds joy within his/her heart.
No one claps when the sun rises, but that does not stop the sun from spreading life-giving warmth and light for the whole world.