What does "pilgrim soul" in When You Are Old poem mean?

The phrase “pilgrim soul” may refer to Gonne's independent frame of mind, or perhaps her support for freedom and Irish nationalism. In any case, it is something unique to her in Yeats' mind and separate from the more transient qualities of her beauty. The third stanza seems packed with meaning and power.

Explanation:

cad, or computer-aided design and drafting (cadd), is a software for design and technical documentation, which is an automated process as opposed to the manual drawing of plans. this gives a person an advance in making plans as an architect in a short period of time. one who can render plans through this software will gain a skill that is better than one who makes plans manually. this is a skill some companies look for in an employee.

buddhists follow great values like treating people with equal rights and looking after everyone with kindness. the lord buddha did his best to his followers and those who needed mandala is a man with great values and has done a great job throughout his life for others instead of being selfish like politicians these days