We must entertain considerable doubt about the proclivities of Timaeus. For he tells us that poets and authors reveal their real natures in their works by dwelling excessively on certain matters.
Homer, he says, is constantly feasting his heroes, and this indicates that he was more or less of a glutton. Aristotle frequently gives recipes for cookery in his works, so he must have been an epicure and a lover of dainties.
In the same way Dionysius the tyrant revealed his effeminate tastes by his interest in bed-hangings and the constant study he devoted to varieties and peculiarities of different woven work.
We are driven then to form our opinion of Timaeus on the same principle and to take and unfavourable view of his own tendencies.
For while he exhibits great severity and audacity in accusing others, his own pronouncements are full of dreams, prodigies, incredible tales, and to put it shortly, craven superstition and womanish love of the marvellous.
Be that as it may, it is made evident from what I have just said and from this case of Timaeus that owing to ignorance and a defect of judgement many men are at times as it were absent when present and blind with their eyes open.
Walbank Commentary