Ambition is the lever of all motives?

The phrase “Ambition is the lever of all motives” means that ambition is the driving force that pushes people to act and achieve their goals.

Ambition = a strong desire to achieve success, power, or something great.

Lever = something that helps move or motivate other things.

So, the sentence suggests that ambition motivates people to work hard, make decisions, and pursue success. Without ambition, many people would not have the motivation to improve their lives or accomplish big goals.