This passage from Clarke's book was inspiring:
(Petrosian is) one who does what is needed to meet the requirements of a position and, on the whole, makes no attempt to impose his own wishes on itClarke contrasts Petrosian with another world champion, Tal in this way:
... the basic rule observed by Petrosian is flexibility ... He strives to obtain the maximum co-operation and efficiency from his forces, estimating this to be more important than attacking or even taking the initiative
Of the three elements that comprise chess - force, space and time - Tal has a heightened awareness of the last ...(whereas) Petrosian's fundamental strategy consists in the fight for and conquest of key squares - and space in generalI realise that my attempts at sharp forcing tactics sometimes represent anxiety on my part. I'm afraid that I won't know what to do or I might be bored in a closed equal position so I push too hard too early. I'm trying to correct this by keeping calm and let the position develop through its own internal logic, rather than impose my will artificially on it.