What is the difference and relation between chanda and cetana?
OP: What is the difference between chanda and cetana?


Chanda is the desire to act. E.g. if you stand from a seat you have to have the "intention" to do it, but can choose not to if you want




A Comprehensive Manual of Abhidhamma

Cetana is volition. This is what makes you commit a certain course of action to realise a goal or a wish. E.g. I a feeling hungry hence I will to get up and go to the fridge to get some food.



A Comprehensive Manual of Abhidhamma


  OP: How do these two relate to each other?


Cetana is what pulls you in a certain direction in taking action. Chanda is the desire to do the act. E.g. (1) I am feeling hungry, but I am lazy to get up from bed. Here I have the intention but not the will to act. (2) I have money to buy a beggar or donate it to a beggar, but I choose to donate it. Here there is an intention to eat and donate but volition to donate.

Chanda is karmically neutral. Cetana is what decides the karma.


  OP: If they are related, which one comes first, and which after?


They are present in the same mind moment if Chanda occurs. Cetana is a universal mental factor and is there in every mind moment. Chanda is an occasional factor hence there only in certain mind moments.


  OP: Is one a condition for the other?


Cetana is the driving force which conditions chanda also.