A vow is a purely religious act which cannot be taken in a fit of passion. It can be taken only with a mind purified and composed and with God as witness. ↗
I know, to banish anger altogether from one's breast is a difficult task. It cannot be achieved through pure personal effort. It can be done only by God's grace. ↗
We do not need to proselytise either by our speech or by our writing. We can only do so really with our lives. Let our lives be open books for all to study. ↗