What is the foremost enemy that we must strive to subdue and win over?
Ego is the enemy number one of your spiritual progress.
Egoism is the Chief Executive of the Kali (Iron) Age. It is egoism and its attendant evils that stalk the world today.
Egoism breeds the scourges of greed and hate. Even leaders of ascetic orders and heads of monastic institutions, suffer from egoism and indulge in the pastime of competition and conflict with other orders and institutions.
Some of them wear elaborate outward symbols of spiritual splendour, especially when the camera is aimed.
There is a popular adage which says that an aspirant (sadhaka) must eat like a dog and wander about like a fox, meaning that he must be content with whatever he is able to get and rest wherever he can.
Man is but an instrument in the Divine's hands; his plans can win through only when they are in line with His!
- Divine Discourse, Oct 04, 1965.
The ego is very dangerous and powerful. It ruins your character.
Source: radiosai.org