You can pursue more without insulting what already exists.

Ambition often runs on dissatisfaction, and dissatisfaction has a habit of retroactively devaluing everything you already achieved. That is not necessary. You can want more while still holding that what you have is real and was hard to get and is worth something.

When you set a new goal, spend a moment on the previous one first. Say what it gave you. Wanting the next thing does not require declaring the last thing insufficient, and the difference shows up in how the pursuit feels.