Charity donations add up little by little, and in the end they help many people.
Tips
history
Roots in 《战国策·秦策四》 ('thin layered into thick, few gathered into many') and 《汉书·董仲舒传》 ('few collected become many, small accumulated becomes vast'). The four-character form crystallized from these classical lines.
usage
Practical and motivational — common in advice about saving money, learning, exercise, fundraising. Often paired with verbs like 坚持 (jiānchí, to persist).
