Can you please explain this(Simple):

"I took right of the cause. I could do but little...I did with a joyful heart, and never felt happier than when in an anti-slavery meeting...But, while attending an anti-slavery convection at Nantucket, on 11th of August,1841, I felt strongly moved to speak...The truth was, I felt myself a slave, and the idea of speaking to white people weighed me down. I spoke but a few moments, when I felt a degree of freedom, and said what I desired with considerable ease.From that time until now, I have been engaged in pleading the case of my brethren."

2 answers

Take it one sentence at a time.

"I took right of the cause.

I could do but little...I did with a joyful heart, and never felt happier than when in an anti-slavery meeting...

But, while attending an anti-slavery convection at Nantucket, on 11th of August,1841, I felt strongly moved to speak...

The truth was, I felt myself a slave, and the idea of speaking to white people weighed me down.

I spoke but a few moments, when I felt a degree of freedom, and said what I desired with considerable ease.

From that time until now, I have been engaged in pleading the case of my brethren."


What sentence or words don't you understand?
I know what its telling me, but I don't know how to say this differently