Go from strength to strength
Definition 1 of 1
Pro Tip 1/3Positive Momentum
Use when discussing positive progress, especially when it's ongoing and shows no signs of stopping. 
Ever since the merger, our company has gone from strength to strength.
Pro Tip 2/3Success Amplified
Implies that success leads to more success, like a snowball effect. 
With every new book she writes, the author goes from strength to strength.
Pro Tip 3/3Never Complacent
Suggest that someone doesn't settle for their current achievements but works for more. 
After winning the award, the young scientist went from strength to strength in her research.