Anything which goes up comes down and anything which moves laterally has a bright chance to either get lost, or get attracted and attached to a stronger force. The best option is not to go upward or sideways, but to go deeper. How can one go deeper? The answer is by digging and removing whatever is encountered and that includes precious and good things.
The majority of us are very good in identifying the good and bad stuff, and when one is trying to dig deeper, the biggest challenge is not encountering and clearing off the lousy stuff, but encountering and getting attached to precious things or noble ideas and getting carried away by them. This results in stoppage of the digging process.