Meaning: When people feel hopeful, their positive feelings grow and negative feelings disappear.
Choice of Words: Hope is a feeling of expectation and desire for something good to happen. Ignites means to set fire to something or to cause a strong feeling or emotion. Despair is a feeling of complete hopelessness and sadness. Fades means to gradually become weaker or less visible. When you put them together, the sentence suggests that optimism and positive expectations are growing stronger, while feelings of hopelessness and sadness are diminishing.