In the attempt to make scientific discoveries, every problem is an opportunity — and the more difficult the problem, the greater will be the importance of its solution.

The remark frames scientific research as a mindset: problems are not merely obstacles but openings into new knowledge. It also proposes a rough proportionality between difficulty and payoff—hard problems tend to sit closer to the boundaries of what is known, so solving them can reorganize understanding, create new methods, or unlock whole lines of inquiry. Implicitly, it encourages intellectual risk-taking and persistence, suggesting that the emotional experience of difficulty (confusion, failure, slow progress) is often a sign that one is working near a productive frontier. The quote also carries an ethical undertone common in scientific culture: ambition should be directed toward questions whose answers matter, not just those that are easy to publish.