We press play, don't press pause
Progress, march on!

from Macklemore and Ryan Lewis (Ft. Macklemore & Mary Lambert) – Same Love Lyrics on Rap Genius

Meaning

Things have to keep moving forward, not stopping.

This could also be a reference to the phrase “pause” which people often say to assert their heterosexuality when they say something that could be misconstrued as being homosexual, i.e., “suspect” as some say.

Here Macklemore is saying stop saying “pause” because all people are equal and being gay isn’t a bad thing so one needn’t say pause. Instead “press play” which means to move forward. Thus “progress, march on”.

To help improve the meaning of these lyrics, visit “Same Love” by Macklemore and Ryan Lewis (Ft. Macklemore & Mary Lambert) Lyrics and leave a comment on the lyrics box