Roger.Ebert(4)

His pursuit ends at dawn when she wades into the Trevi Fountain and he wades after her, idealizing her into all women, into The Woman; she remains forever just out of reach.This sequence can be paired with a later one where children report a vision of the Virgin. Marcello races to the site, which is surrounded by TV cameras and a crowd of the devout.Again,we have an idealized woman and the hope that she can solve every problem. But the children lead the faithful on a chase, just as the Ekberg led Marcello around Rome. They see the Virgin here, and then there, as the lame and the blind hobble after them and their grandfather cadges for tips. Once again everything collapses in an exhausted dawn.

The central episodes in "La Dolce Vita" involve Steiner, who represents all that Marcello envies. Steiner lives in an apartment filled with art. He presides over a salon of poets, folk singers, intellectuals. He has a beautiful wife and two perfect children. When Marcello sees him entering a church, they ascend to the organ loft and Steiner plays Bach while urging Marcello to have more faith in himself, and finish that book. Then follows the night of Steiner's party, and the moment (more or less the exact center of the film) where Marcello takes his typewriter to a country trattoria and tries to write. Then comes the terrible second Steiner scene, when Marcello discovers that Steiner's serenity was made from a tissue of lies.