''There is nothing wrong with having a word or two as it shows aggression. But it is important that the aggression remains controlled aggression,'' Ishant told newspersons here yesterday.
''One should be careful not to over-react as it can affect one's game. I have learnt about it and am a thinking bowler now,'' he added.
The BCCI had recently proposed a ban on sledging which was opposed by Cricket Australia (CA).
Ishant, who was left out from the Indian squad for the ongoing Test against South Africa in Chennai due to a finger injury, is confident of returning for the next match in Ahmedabad starting on April 3.
''It is disappointing to miss a Test match but one cannot do anything about injuries,'' he remarked. ''I will be fit for the next Test and am looking forward to the future.
''I had been advised three weeks' rest and have started bowling a few days ago but am careful not to put too much load on myself.'' The 19-year-old from Delhi, who became the fastest Indian bowler when he clocked over 150 kmph during the recent tour of Australia, is looking to focus more on line and length.
''I am not concentrating on speed but trying to bowl with good rhythm. I get natural bounce from my action and height, but am looking to bowl good line and length,'' Ishant stated.
Ishant, who has been signed by the Indian Premier League's (IPL) Kolkata franchise, is looking forward to play in the lucrative Twenty20 competition.
''I am feeling positive about the IPL and don't feel any pressure,'' he quipped.
He was also eager to bowl with Pakistan fast bowler Shoaib Akhtar who is his teammate in the IPL.
''He is the fastest bowler in the world and I would try to learn from him,'' he said.