The phrase "lifelong pursuit" means something that you constantly work towards or try to achieve throughout your entire life. It is an ongoing goal that you never give up on. Full definition
While some financial careers are better served by an existing network of clients, others can become lifelong pursuits that bring a great deal of professional satisfaction. (resume-now.com)
It's a lot more interesting than Pip's lifelong pursuit of bitchy, beautiful Estella (breathsnatching Holliday Grainger). (rogerebert.com)
Marcus Davenport showed up at the University of Texas at San Antonio — which played its first game in 2011 — weighing less than 200 pounds, having switched positions late in high school and viewing football as a means to a good education rather than a potential lifelong pursuit. (si.com)