Once you learn calculus, you've caught up to what was the cutting edge of math in 1687.
“If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is.” -- John von Newmann
'Mathematics is an experimental science, and definitions do not come first, but later on.' -- Oliver Heaviside
'Mathematics compares the most diverse phenomena and discovers the secret analogies that unite them.' -- Joseph Fourier
Gödel (1940): The continuum hypothesis is not false. Cohen (1964): The continuum hypothesis is not true. (It's undecidable.)