Our own resolute efforts to improve things

"It is one of the sublimest aspects of Popper's philosophy that, austerely rigorous though it is in its invocation of logical principles, it nonetheless exudes a deep sense of understanding of human imperfection. By insisting that the answer to our ignorance and to our fallibility lies not in pretending to know more than we do, or to know it more surely, but only in our own resolute efforts to improve things, Popper succeeds in restoring to human beings some of the dignity and the self-respect of which modern philosophy has sometimes seemed all too disposed to dispossess them."