This is a work by Hua Shikui (1863-1941, courtesy name Qichen, alias Bichen, Han nationality, host in Wuxi, Jiangsu, and later moved to Tianjin), one of the Eight Great Masters of Tianjin.
Mao [mào]’s basic meaning:
1. Work hard.
2. Same as "mao" in ancient times, grand.
3. Encouragement, encouragement.
4. Beauty.
5.Happy.
The basic meaning of 猷[yóu]:
Strategy, plan, plan: new~. Macro~. Hong~.
Now that you know these two words, you should be able to understand the general meaning of this couplet, right?