People who exercise with weights are advised to put 100% of their effort in lifting the weight and not waste any energy on exhibiting any strains in their face. Piano players are also advised against exaggerating their playing gestures. There is a point here which I can apply to praying. If there is something that weighs heavily upon our heart, the intense emotion we feel while we pray to God is best channeled 100% into putting our trust in God, thereby relieving the burden on us. It is, instead of trying hard to want to lighten the load by ourselves, concentrating upon letting God do it for us.