Success is relative not absolute.

Example 1

Consider two people:

A person born with 0 who saves $1.

Another person born with $1,000,000 who saves 0.

From the surface we would consider the person with $1,000,000 more successful.

But in reality the person who saved $1 is more successful.

Example 2

Consider two more people:

A person can naturally run a 5:00 minute mile with little to no training.

Another person can naturally run a 10:00 minute mile with little to no training. The same person trains and can now run a 6:00 minute mile.

From the surface we would consider the person who can run a 5:00 minute mile more successful.

But in reality the person who can now run a 6:00 minute mile is more successful.

Success is in the progress we make.