How do we weaken the ego and ultimately subdue it?

By thinking of God's all-pervading Consciousness. This Consciousness is not something that we have to achieve. This Consciousness is already within us; we have just to be aware of it. Further, while we are in meditation we have to develop it and illumine it to infinite proportions. And to our wide surprise, the ego will be buried in the bosom of death.

From:Sri Chinmoy,Yoga and the spiritual life. The journey of India's Soul., Tower Publications, Inc., New York, 1971
Sourced from https://srichinmoylibrary.com/ysl