“And it shall be my endeavour to reveal thee in my actions”
Tagore connects devotion with conduct: inward belief is meant to become visible through what a person actually does rather than remain only an interior feeling.
Source details
Gitanjali, poem 4, in Tagore’s own prose translations from Bengali; Project Gutenberg #7164. The omitted continuation explicitly attributes the strength to act to the divine addressee, so the line remains religious rather than generic productivity advice.