spring for

Pierian spring

The source of knowledge, inspiration, or learning.

spring fever

A feeling of invigoration and restlessness associated with the arrival of the warm weather and renewal of nature in the spring season.

spring in one's step

Enthusiasm, energy or a positive outlook or cheerful attitude.

spring to life

To start to exist.

spring to mind

To appear suddenly in one's thoughts, often as an example of something.