Step 1: Locate the word related to the meaning.
In the passage, the word inclinations is used in the sentence describing how a person fulfils obligations according to his abilities.
Step 2: Understand the meaning of the word.
The word inclinations means a natural tendency, preference, or leaning toward something.
Step 3: Identify the synonym.
Since ``leaning'' means a tendency or preference, the word in the passage that has the same meaning is inclinations.
Step 4: Conclude the answer.
Therefore, the word in the passage that means the same as ``leaning'' is inclinations.