Two Agnostics

The LORD has looked down from heaven upon the sons of men to see if there are any who understand, who seek after God. They have all turned aside, together they have become corrupt; There is no one who does good, not even one (Psalm 14:2-3 NASB).

Buddha and Confucius are two agnostics who developed some methodology to seek certain truth. They did not use these methodology to seek God (see Psalm 14:2-3, above). Buddha taught Eight-fold path 八正道 to achieve human perfection. Confucius taught Eight Items 八目 to achieve world peace.

八目
Investigation of things 格物、Extend knowledge 致知、诚意、正心、修身、齐家、治国、平天下

Eight-fold path 八正道
Wisdom
Right View 正見, Right Intention 正思惟

Ethical Conduct
Right Speech 正語, Right Action 正業, Right Livelihood 正命

Mental Development
Right Effort 正精進, Right Mindfulness 正念, Right Concentration 正定