Imam As-Sajjad (a.s.) said:
لاَ يَقِلُّ عَمَلٌ مَعَ تَقَوى وَ كَيْفَ يَقِلَّ ما يُتَقَبَّلُ
A deed accompanied with sincerity and piety is not small, although it may look small. How is it possible for a deed favored by God to be small!?1
The Holy Qur’an says: God only accepts the deeds which are accompanied with piety and pure intention. Thus, purity in intention and sincerity and piety should be the most important consideration . Such deeds are valuable even if in material terms the quantity etc is small , because they are favored by God and thus can never be considered little. In summary, hollow, impure and hypocritical deeds are worthless no matter how numerous and large they are, whereas even something light and little performed with pure and sincere intention is worthy and weighty.