2. Knowledge is a kind of happiness, while curiosity is the bud of knowledge. The writer is Francis Bacon.

3. Curiosity makes scientists and poets. The writer is Francis.

4. Life is meaningless if the vigor of youth has disappeared and the curiosity of progress has declined. The author is Mueller.

5. Curiosity is one of the most enduring and reliable characteristics of wisdom and vitality. The writer is samuel johnson.

6. Curiosity is the source of endless perseverance and patience for scientific workers. The author is Einstein.