Out of sight, out of mind.

Другие идиомы:

• great minds think alike
• out of thin air
• out of town
• weigh on (someone's) mind
• out of control
• out of the running
• out of the woods
• out in left field
• out and about
• have a lot on one's mind
• out of the ordinary
• mind-numbing
• mind over matter
• in a positive frame of mind
• out of reach