This few weeks i learnt something

I learnt that we should not say ‘i will try’. Instead we should say ‘i must’ or ‘i will’.
Because when we say ‘i will try’, other people tend to think that we are not serious in what we are doing. Let say when someone invites you to his/her house for a function, then you reply ‘i will try to come’. It shows that you are not sure or basically you are not coming at all.
In Malay community we usually use the word ‘InsyaAllah’ inappropriately. When someone request or ask us to come to the surau for ta’lim, for example, we would say ‘InsyaAllah’ with intonation that sounds like we will not be going. For me, this is not appropriate as ‘InsyaAllah’ word, from what i’ve learnt, it means ‘with Allah permission’ (please correct me if i’m wrong). So, we are making a promise, whatever happens we must try to fulfil that promise unless Allah does not let it to happen.
In a nut shell, we must use the correct term at the correct time, context and intonation because what and how we say something will tell people what type of person we are...so be careful in everything we say.