Flexibility (mudutà) in the psychological sense is the quality of being able to see changes and nuances in a situation or principle and adjust to them accordingly. In the Mettà Sutta, the Buddha advocates flexibility together with several other rarely discussed but important virtues: `One should be capable, straightforward, very straightforward, easy to speak to, flexible and modest' (Sn.143). The Jàtaka advises the courtier: `Be as pliant as bamboo, and then you will be able to live in the king's court'(Ja.VI,295).
The Buddha's flexibility is most apparent in his attitude to rules. He made rules for monks and nuns to address specific problems and he expected everyone to take them seriously and abide by them. However, he was wise enough to understand that no rule can cover every possible situation, that situations change and, therefore, that rules should be changed when necessary. In the Vinaya we see how rules were adjusted and modified and just before his passing the Buddha told his disciples that they could change minor rules when the need arose (D.II,154). Intellectual flexibility (cittamudutà) is important also (Dhs.45). To have views and opinions but without being pedantic, dogmatic or rigid about them is an important aspect of detachment. See Skilful Means.