Plus... plus..., moins... moins... = the more...the more..., the less...the less... (comparisons with phrases)

Look at these comparisons:

Notice that expressions like the more X the more Y are similar in French, but the definite article (the) doesn't make an appearance.

Note also that in French you keep the order of the sentence intact, unlike English where you put the adjective after more for example, The more anxious you are...

See also Better and better, worse and worse = de mieux en mieux, de pire en pire (comparisons), De plus en plus and de moins en moins = more and more and less and less (comparisons with adjectives, adverbs, verbs) and De plus en plus de and de moins en moins de = more and more and less and less (comparisons of nouns)

Here are other Comparative structures:

Making comparisons with adjectives: plus... que, aussi... que, moins... que
Making comparisons with adverbs: plus... que, aussi... que, moins... que
Making comparisons with verbs: plus que, autant que, moins que
Making comparisons with nouns: plus de... que, moins de... que, autant de... que

And Superlative structures:

Le, la, les plus and le, la, les moins = the most and the least (superlatives of adjectives)
Le plus and le moins = the most and the least (superlative of adverbs)
Forming the superlative of adjectives in complex cases
Meilleur, mieux, pire / plus mauvais, plus mal = better, best, worse and worst (irregular comparatives and superlatives)