I think Beethoven means dissonances to be more stressed than consonances - it's the shock tactician in him.
Beethoven's deliberate use of dissonance as a tool to evoke surprise and emotional impact showcases his mastery in balancing tension and resolution. This approach invites listeners to embrace moments of novelty and upheaval, enriching the musical narrative. It emphasizes that tension isn't merely a flaw but a vital expressive device, demonstrating Beethoven's innovative spirit and understanding of music as a dynamic form of communication.
---Simon Rattle---